Multifunctional gas sensor and preparation method thereof

Abstract

The invention relates to the technical field of gas sensors, and discloses a multifunctional gas sensor and a preparation method thereof.The gas sensor comprises a shell assembly and a fixing assembly, the shell assembly is used for protecting an internal circuit structure, and the fixing assembly is used for installing the shell assembly to an area needing to be detected; by arranging the elastic silk screen, the diameter of the through hole in the expansion pipe is increased in the expansion process of the expansion pipe, in this way, pulling force can be applied to the elastic silk screen, the elastic silk screen is completely unfolded, and in the expansion process of the expansion pipe, due to the fact that the size of the expansion pipe is increased all the time, the circulation amount of the expansion pipe is increased; furthermore, gas in the gas supply pipe can quickly pass through the expansion pipe, gas accumulation at the expansion pipe is relieved, the heat volatilization efficiency during gas flowing is improved, impurities in the gas can be filtered and blocked through expansion of the elastic silk screen, the impurities in the gas are prevented from entering the gas sensing element, and the gas sensing element is prevented from being damaged. The detection result of the gas concentration is influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas sensors, and in particular to a multifunctional gas sensor and a preparation method thereof. Background Art

[0002] A gas sensor is a converter that converts the volume fraction of a certain gas into a corresponding electrical signal. The detection head conditions the gas sample through the gas sensor, usually including filtering out impurities and interfering gases, and drying or refrigerating the instrument display.

[0003] A Chinese invention patent with publication number CN110514786A discloses a multifunctional gas sensor, including a gas guide fan and a fan power plug. The circuit board is a rectangular plate structure, and the gas sensor is welded on the circuit board, the fan power socket is welded on the top end surface of the circuit board, and the fan power socket is electrically connected to the connecting plug, the connecting plug is welded on the top end surface of the circuit board, and the connecting plug is plugged into the connecting plug wire, the protective cover is installed on the top of the circuit board, and the gas guide fan is installed on the top front end of the protective cover, the protective cover is installed on the top of the circuit board, and the gas guide fan is installed on the top front end of the protective cover, which is conducive to detecting the gas concentration through the gas sensor, and converting the gas concentration information into information that can be used by instruments, computers, etc., and timely reminding and informing personnel to ensure the gas concentration detection effect.

[0004] In the above technical solution, when the detected area is in a severe situation such as an accidental fire, the surrounding gas will be in a high temperature state, but the prior art does not have measures to cool and protect the gas sensing element, which will cause the high-temperature gas to directly enter the detection area of ​​the gas sensing element and cause the detection sensitivity of the gas sensing element to decrease due to the high-temperature gas, and the gas detection ability to become weak, and the high-temperature gas will also cause the interior of the gas sensing element to melt or be damaged.

[0005] Therefore, it is necessary to solve the above problems through a multifunctional gas sensor and a preparation method thereof. Summary of the invention

[0006] The object of the present invention is to provide a multifunctional gas sensor and a method for preparing the same, so as to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a multifunctional gas sensor, comprising a housing component and a fixing component, wherein the housing component is used to protect the internal circuit structure, and the fixing component is used to install the housing component to the area to be detected, the lower surface of the housing component is fixedly arranged on the upper surface of the fixing component, and a power supply component is arranged inside the housing component;

[0008] The shell assembly includes a first shell, one side of which is connected to one end of an air supply pipe, a cooling bin is fixedly arranged inside the air supply pipe, a refrigeration bin is arranged on one side of an inner wall of the cooling bin, one side of the refrigeration bin is connected to one end of a delivery pipe, the other end of the delivery pipe is connected to an output end of a condensation bin via a self-priming pump, a surface of the delivery pipe is fixedly arranged on a surface of a support plate via a limit frame, and a pressure sensor is arranged on one side of an inner wall of the cooling bin.

[0009] Preferably, a filter plate is fixedly connected to one side of the inner wall of the first shell, a rotating shaft is slidably arranged inside one side of the filter plate, a roller is fixedly connected to the outer surface of the rotating shaft, and a return spring is fixedly arranged inside one side of the roller;

[0010] The lower surface of the first shell is fixedly connected to the upper surface of the support plate, the upper surface of the support plate is fixedly arranged on the bottom of the circuit board, a temperature sensing element is arranged on the surface of the circuit board near the air outlet of the first shell, and a fan is arranged on the surface of one end of the air supply pipe.

[0011] Preferably, the surface of the roller and one side of the sealing plate are intertwined with each other, and the right side of the sealing plate is fixedly connected to one side of the transmission rod, the bottom end of the transmission rod is fixedly arranged on the upper surface of the first slider, one side of the first slider is movably arranged inside one side of the slide rail, and one side of the first slider is fixedly connected to the output end of the electric push rod;

[0012] A plurality of elastic rods are arranged on one side of the transmission rod, and the elastic rods are longitudinally and equidistantly distributed on the left and right sides of the transmission rod, and the diameter of the elastic rods is consistent with the diameter of the filter holes on one side of the filter plate.

[0013] Preferably, the fixing assembly includes a support rod and a support plate, the surface of the support rod is fixedly arranged inside the support plate, the bottom end of the support rod is fixedly connected with a suction cup, a threaded hole is arranged on one side of the support rod, the number of the support rod and the suction cup are four, and each of the support rod and the suction cup are symmetrically distributed on one side of the support plate.

[0014] Preferably, a driving rod is slidably connected inside one side of the refrigeration bin, the top end of the driving rod is fixedly connected to one side of the sealing plug, a first spring is fixedly provided on one side of the sealing plug, and the bottom end of the first spring is fixedly connected to the bottom surface of the inner wall of the refrigeration bin.

[0015] Preferably, the upper surface of the circuit board is fixedly welded with a gas sensor and a socket, the inside of one side of the socket and the right end of the power cord, and the left end of the power cord is movably arranged inside a slot on one side of the first shell.

[0016] Preferably, filter holes are provided on one side surface of the filter plate, an anti-slip film is provided on one side surface of the filter plate, and the anti-slip film is provided on both left and right sides of the filter plate.

[0017] Preferably, the lower surface of the slide rail is fixedly arranged on the upper surface of the circuit board close to the filter plate, and the front and rear side surfaces of the inner wall of the slide rail are fixedly connected to the left end of the electric push rod.

[0018] Preferably, the surface of the air supply pipe is fixedly connected to a limiting tube, one side of the limiting tube is slidably connected to the surface of one side of the sliding rod, the upper end of the sliding rod is fixedly connected to a storage bin, one side of the storage bin is provided with a through hole, the bottom end of the sliding rod is fixedly connected to a force-bearing plate, the upper surface of the force-bearing plate is fixedly connected to a second spring, the top of the second spring is fixedly connected to the inside of the limiting tube, an expansion tube is fixedly provided inside one side of the air supply pipe, the left and right ends of the expansion tube are fixedly connected to the surface of the delivery pipe through a limiting ring, a vent is provided inside the expansion tube, and an elastic wire mesh is provided on the surface of the vent.

[0019] The present invention also discloses a method for preparing a multifunctional gas sensor, the method comprising the following steps:

[0020] S1. Connect the housing component to the surface of the support plate in the fixing component by screws, and place one side of the circuit board inside the housing component;

[0021] S2, welding the gas sensing element and the temperature sensing element to the surface of the circuit board, and then electrically connecting the circuit board to the external power supply through the power supply assembly;

[0022] S3. Fix the housing assembly and the power supply assembly in the detection area by means of a fixing assembly.

[0023] Technical effects and advantages of the present invention:

[0024] 1. The present invention increases the diameter of the through hole at the expansion tube by arranging an elastic wire mesh during the expansion of the expansion tube, which applies tension to the elastic wire mesh and fully expands the elastic wire mesh. During the expansion of the expansion tube, the volume of the expansion tube increases continuously, thereby increasing the flow rate at the expansion tube, and the gas in the air supply pipe can quickly pass through the expansion tube, thereby alleviating gas accumulation at the expansion tube and increasing the efficiency of heat volatilization when the gas flows. By expanding the elastic wire mesh, impurities in the gas can be filtered and blocked, thereby preventing impurities in the gas from entering the gas sensing element and affecting the detection result of the gas concentration.

[0025] 2. The present invention sets a sliding rod, and the surface of the expansion tube applies a thrust to the bottom end of the sliding rod, so that the sliding rod slides upward. Since the material of the sliding rod has a heat-conducting effect, the heat in the expansion tube will be absorbed during the upward sliding process of the sliding rod. When the expansion tube expands and pushes the sliding rod to move a certain distance upward, the fan is turned on to work and blow on the surfaces of several sliding rods. At this time, the airflow blown by the fan will flow rapidly inside the cooling bin, and the heat on the surface of the sliding rod can be quickly blown away through the through hole on one side of the cooling bin, and the external airflow is introduced to complete the air exchange to achieve the effect of lowering the gas temperature in the expansion tube.

[0026] 3. The present invention sets a driving rod, and applies pressure to the driving rod through the transmission rod, so that the driving rod drives the sealing plug to move upward. At the same time, the condensing bin is opened and the refrigerant in the condensing bin is introduced into the refrigerating bin through the conveying pipe and the movement of the self-priming pump. At this time, as the sealing plug slides upward, the refrigerant in the refrigerating bin will pass through the gap around the driving rod and the refrigerating bin into the storage bin, and the refrigerant in the storage bin will flow into the transmission rod through the through hole on the side of the storage bin close to the sliding rod. At this time, the internal gas heat of the expansion tube can be rapidly absorbed, thereby achieving the purpose of quickly reducing the heat in the gas.

[0027] 4. The present invention sets a transmission rod, which drives the driving rod to continue to push up. When the temperature continues to rise, the transmission rod and the driving rod will penetrate the cooling bin, and the cooling bin will rupture and explode. At this time, the sound caused by the rupture and explosion of the cooling bin prompts the staff to handle the fire, and an alarm is sounded through the gas sensor, and the circuit on the circuit board is disconnected. At the same time, the power supply component is completely disconnected from the external power. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall first-view structure of the present invention;

[0029] Figure 2 It is a front view of the overall structure of the present invention from a second viewing angle;

[0030] Figure 3 This is a schematic diagram of the overall structure of the present invention in an open state;

[0031] Figure 4 This is a schematic diagram of the structure of the cooling bin in the open state of the present invention;

[0032] Figure 5 It is a schematic diagram of the structure of the sliding rod of the present invention;

[0033] Figure 6 It is a schematic diagram of the slide rail structure of the present invention;

[0034] Figure 7 This is a schematic diagram of the rotating shaft structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the filter plate structure of the present invention;

[0036] Fig. 9 This is a schematic diagram of the expansion tube structure of the present invention;

[0037] Fig.10 It is a schematic diagram of the transmission rod structure of the present invention.

[0038] In the figure: 1, shell assembly; 101, first shell; 102, condensing chamber; 103, limiting frame; 104, conveying pipe; 105, refrigerating chamber; 106, cooling chamber; 107, sealing plug; 108, limiting pipe; 109, expansion pipe; 110, air supply pipe; 111, sliding rod; 112, first spring; 113, storage bin; 114, second spring; 115, elastic wire mesh; 116, fan; 2 , fixing assembly; 201, support rod; 202, support plate; 3, power supply assembly; 301, power cord; 302, socket; 303, air sensing element; 304, filter plate; 305, temperature sensing element; 306, circuit board; 307, rotating shaft; 308, first slider; 309, slide rail; 310, sealing plate; 311, return spring; 312, roller; 313, transmission rod; 314, electric push rod. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] First embodiment

[0041] like Figures 1 to 10 As shown, this embodiment discloses a multifunctional gas sensor, including a housing component 1 , the lower surface of the housing component 1 is fixedly arranged on the upper surface of the fixing component 2 , and a power supply component 3 is arranged inside the housing component 1 .

[0042] The fixing component 2 includes a support rod 201, and the fixing component 2 includes a support rod 201 and a support plate 202. The surface of the support rod 201 is fixedly arranged inside the support plate 202. The bottom end of the support rod 201 is fixedly connected with a suction cup. A threaded hole is arranged on one side of the support rod 201. There are four support rods 201 and four suction cups. Each support rod 201 and suction cup are symmetrically distributed on one side of the support plate 202. When in use, the suction cup is used to adsorb the area to be detected, and the screw is fixed to the wall for a second time through the threaded hole at one end of the support plate 202 to prevent the shell component 1 and the power supply component 3 from being damaged. The outer shell component 1 includes a first outer shell 101, and a filter plate 304 is fixedly connected to one side of the inner wall of the first outer shell 101. A rotating shaft 307 is slidably arranged inside one side of the filter plate 304. A roller 312 is fixedly connected to the outer surface of the rotating shaft 307. The surface of the roller 312 is intertwined with one side of the sealing plate 310, and the right side of the sealing plate 310 is fixedly connected to one side of the transmission rod 313. A plurality of elastic rods are arranged on one side of the transmission rod 313, and the elastic rods are longitudinally equidistantly distributed on the left and right sides of the transmission rod 313. The diameter of the elastic rods is consistent with the diameter of the filter holes on one side of the filter plate 304.

[0043] When in use, when the first slider 308 drives the transmission rod 313 to slide in the slide rail 309, the elastic rod on the surface of the transmission rod 313 will slide in contact with one side of the inner wall of the filter plate 304. When the elastic rod (the elastic rod is arranged on the side of the transmission rod 313 facing the filter plate 304, which is not specifically shown in the figure, when the transmission rod 313 moves, the elastic rod on its surface will slide along the filter holes on the surface of the filter plate 304 and insert into the filter holes to realize the ejection and cleaning of impurities) close to one end of the filter plate 304 and slide into the filter holes. , it will be directly inserted into the hole, at which time the impurities inside the hole will be pushed out to prevent the filter hole from being blocked by impurities. After the elastic rod moves out of the filter hole, it will be quickly reset by its own elasticity to prepare for entering the next filter hole for insertion. When the elastic rod has not entered the filter hole, it is bent. At this time, the elasticity of the elastic rod is in a compressed state, which will increase the potential energy of the elastic rod when entering the hole, causing the filter plate 304 itself to vibrate slightly, thereby achieving the purpose of cleaning the impurities on the filter plate 304 again.

[0044] The bottom end of the transmission rod 313 is fixedly set on the upper surface of the first slider 308, one side of the first slider 308 is movably set inside one side of the slide rail 309, the lower surface of the slide rail 309 is fixedly set on the upper surface of the circuit board 306 close to the filter plate 304, and the front and rear side surfaces of the inner wall of the slide rail 309 are fixedly connected to the left end of the electric push rod 314.

[0045] When in use, the electric push rod 314 is started to apply a thrust to one side of the first slider 308, so that the first slider 308 slides inside the slide rail 309. During the sliding process of the first slider 308, the transmission rod 313 is driven to follow the first slider 308 to make lateral movement. The movement of the sliding rod 111 causes the sealing plate 310 to move in the same direction as the sliding rod. At the same time, the sealing plate 310 applies a pulling force to the roller 312 and rotates it, so that the sealing plate 310 is flattened, so that the gas cannot pass through the filter plate 304 and directly enter the gas sensing element 303 for detection. One side of the first slider 308 is fixedly connected to the output end of the electric push rod 314.

[0046] When in use, the sealing plate 310 and the surface of the roller 312 are entangled with each other, that is, when the electric push rod 314 is working, it can push the first slider 308 to slide inside one side of the slide rail 309, and at the same time, the transmission rod 313 will also slide along one end of the slide rail 309. In this way, the pulling force of the sealing plate 310 can cause the roller 312 to rotate on the surface of the rotating shaft 307, so that the sealing plate 310 can be unfolded and seal the left and right sides of the filter plate 304.

[0047] One side surface of the filter plate 304 is provided with filter holes, and one side surface of the filter plate 304 is provided with an anti-slip film, and the anti-slip films are provided on the left and right sides of the filter plate 304. When in use, when the gas flows through the surface of the filter plate 304, since the external gas will carry a large amount of impurities, the impurities in the gas can be intercepted and filtered through the filter holes on one side of the filter plate 304, and the intercepted impurities will be directly adsorbed to one side of the filter plate 304 without sliding downward, thereby preventing too many impurities from falling into the circuit board 306 and causing heating or short circuit.

[0048] The lower surface of the first shell 101 is fixedly connected to the upper surface of the support plate 202, and the upper surface of the support plate 202 is fixedly arranged on the bottom of the circuit board 306. The upper surface of the circuit board 306 is respectively fixedly welded with a gas sensing element 303 and a socket 302. The inside of one side of the socket 302 and the right end of the power cord 301, and the left end of the power cord 301 are electrically connected to the external power supply through a slot on one side of the first shell 101. When in use, the power cord 301 in the power supply component 3 electrically connects the circuit board 306 and the external circuit through the socket 302, so that the gas sensing element 303 and the temperature sensing element 305 are energized, thereby realizing the function of simultaneously detecting the gas temperature and gas concentration. The circuit board 306 is provided with a temperature sensing element 305 on the surface near the air outlet of the first shell 101. When in use, the temperature sensing element 305 is detected The measured gas temperature value is converted to the circuit board 306, and then transmitted to the staff through the circuit board 306 for easy observation, thereby achieving the purpose of gas temperature detection. The first shell 101 is provided to protect the electrical components on the circuit board 306. A reset spring 311 is fixedly provided inside one side of the roller 312. When in use, the elastic force of the partial reset spring 311 is compressed so that it is always in a negative pressure state of the elastic force. In this way, when the transmission rod 313 is not subjected to the thrust applied by the electric push rod 314, the elasticity of the reset spring 311 will not be restricted and the roller 312 will rotate in the opposite direction of the sealing plate 310, so that the roller 312, the transmission rod 313 and the first slider 308 are quickly reset to the initial position, and the sealing plate 310 will continue to be wound around the surface of the roller 312, which is convenient for use next time.

[0049] One side of the first shell 101 is interconnected with one end of the air supply pipe 110, a cooling bin 106 is fixedly arranged inside the air supply pipe 110, a refrigeration bin 105 is arranged on one side of the inner wall of the cooling bin 106, one side of the refrigeration bin 105 is interconnected with one end of the delivery pipe 104, the other end of the delivery pipe 104 is interconnected with the output end of the condensation bin 102 through a self-priming pump, the surface of the delivery pipe 104 is fixedly arranged on the surface of the support plate 202 through a limiting frame 103, the surface of the air supply pipe 110 is fixedly connected to the limiting pipe 108, one side of the limiting pipe 108 is internally slidably connected to the side surface of the sliding rod 111, the upper end of the sliding rod 111 is fixedly connected to the storage bin 113, one side of the storage bin 113 is provided with a through hole, and the sliding rod 111 is fixedly connected to the storage bin 113. The bottom end of the moving rod 111 is fixedly connected to a force-bearing plate, the upper surface of the force-bearing plate is fixedly connected to a second spring 114, the top of the second spring 114 is fixedly connected to the inside of the limiting tube 108, an expansion tube 109 is fixedly arranged inside one side of the air supply pipe 110, the left and right ends of the expansion tube 109 are fixedly connected to the surface of the delivery pipe 104 through a limiting ring, a vent is arranged inside the expansion tube 109, and an elastic wire mesh 115 is arranged on the surface of the vent, a driving rod is slidably connected to the inside of one side of the refrigeration bin 105, the top of the driving rod is fixedly connected to one side of the sealing plug 107, a first spring 112 is fixedly arranged on one side of the sealing plug 107, and the bottom end of the first spring 112 is fixedly connected to the bottom surface of the inner wall of the refrigeration bin 105.

[0050] When in use, first, the support rod 201 in the fixing component 2 is set in the area to be detected, and then the surface is adsorbed by the suction cup, and then the screw is driven into the inside through the threaded hole in the support rod 201 and fixed to the part adsorbed by the suction cup for a second time to achieve the fixing effect, and the gas enters the inside of the shell component 1, and the temperature sensing element 305 is turned on to detect the gas temperature. The gas inside the first shell 101 will directly enter the rear end of the first shell 101, and the gas sensing element 303 will detect its gas density to achieve the purpose of detecting the gas concentration and gas temperature. When the temperature sensing element 305 detects that the gas temperature rises at this time, it will directly control the electric push rod 314 to apply pressure to the first slider 308, so that the first slider 308 slides along the inside of the slide rail 309 to the other end of the slide rail 309. When the first slider 308 slides, the driving transmission rod 313 will follow the movement of the first slider 308 and slide to the other end of the slide rail 309. During the movement of the movable rod 313, the sealing plate 310 will apply a pulling force to the roller 312, and the roller 312 will rotate on the surface of the rotating shaft 307. When the roller 312 rotates, the sealing plate 310 will be fully unfolded, and the filter holes on the surface of the filter plate 304 will be blocked inside the filter plate 304, so that the air inside the first shell 101 cannot enter the gas sensing element 303. The gas inside the first shell 101 will enter the inside of the air supply pipe 110, and the fan 116 will be turned on by the motor to blow air on the surface of the air supply pipe 110, so that the heat adsorbed by the air supply pipe 110 is quickly exchanged with the external air, thereby reducing the gas temperature inside the air supply pipe 110. By introducing the gas into the air supply pipe 110, the distance and time of gas flow are extended, so that the heat loss rate of the air flow is increased during the flow, thereby preventing the high-temperature gas from entering the gas sensing element 303 and causing the gas sensing element 303 to melt and be damaged.

[0051] It is worth noting that: the initial state of the reset spring 311 is set to a compressed state. When the first slider 308 stops running, the transmission rod 313 will enter a state of no force. At this time, the roller 312 is no longer subjected to the pulling force of the sealing plate 310, and the reset spring 311 will release its own elastic force, so that the roller 312 rotates counterclockwise on the surface of the rotating shaft 307, so that the transmission rod 313 and the first slider 308 are reset through the sealing plate 310.

[0052] Second embodiment

[0053] In the first embodiment, when the temperature of the gas entering the interior is overheated, the electric push rod 314 applies pressure to the transmission rod 313, and cooperates with the first slider 308 to slide in the slide rail 309, so that the gas enters the interior of the gas delivery pipe 110, increasing the gas flow distance, so that the gas flow time will be extended, and this gas temperature cooling method is too inefficient and cannot meet the requirements of quickly lowering the gas temperature. It is still easy for high-temperature gas to enter the interior of the gas sensing element 303 and cannot cope with situations such as fire, thereby causing the gas sensing element 303 to melt and be damaged. Based on this, this embodiment makes the following improvements:

[0054] like Figure 5 As shown, a driving rod is slidably connected inside one side of the refrigeration bin 105, the top end of the driving rod is fixedly connected to one side of the sealing plug 107, a first spring 112 is fixedly provided on one side of the sealing plug 107, and the bottom end of the first spring 112 is fixedly connected to the bottom surface of the inner wall of the refrigeration bin 105. The specific adjustment steps are:

[0055] The gas temperature is detected by the temperature sensing element 305. If the temperature is too high, the electric push rod 314 applies a thrust to the first slider 308 and the transmission rod 313, so that the first slider 308 slides along the slide rail 309 to the other end. When the sealing plate 310 is unfolded, the filter holes on the filter plate 304 are blocked, so that the gas can directly enter the inside of the air supply pipe 110. When the gas flows through the expansion tube 109, the volume of the expansion tube 109 after expansion is detected by the pressure sensor to reflect the temperature of the gas at this time.

[0056] If the pressure sensor detects that there is no change in the expansion tube 109, it means that the temperature of the gas entering the air supply pipe 110 at this time has rapidly lost heat in the gas due to the increase in the gas flow distance and flow time, so that the gas temperature at this time tends to a normal temperature value, and the internal gas is transported to the surface of the gas sensing element 303 by the gas supply pipe 110, and then the gas concentration is detected by the gas sensing element 303 without making any adjustment.

[0057] If the pressure sensor detects that the expansion tube 109 expands slightly, it means that after the gas flows through the expansion tube 109 and enters the expansion tube 109, the flow rate of the expansion tube 109 cannot meet the gas volume at this time, so that the gas at the expansion tube 109 cannot pass quickly, and blockage occurs at the expansion tube 109, resulting in a higher gas temperature. During the expansion of the expansion tube 109, the diameter of the through hole at the expansion tube 109 increases, which will apply tension to the elastic wire mesh 115 and fully expand the elastic wire mesh 115. During the expansion process of the expansion tube 109, the volume of the expansion tube 109 will continue to increase, so that the flow rate at the expansion tube 109 increases, and then the gas in the air supply pipe 110 can quickly pass through the expansion tube 109, which alleviates the gas accumulation at the expansion tube 109, and increases the efficiency of heat volatilization when the gas flows. Through the expansion of the elastic wire mesh 115, the impurities in the gas can be filtered and blocked, preventing the impurities in the gas from entering the gas sensing element 303 and affecting the detection result of the gas concentration.

[0058] If the pressure sensor detects that the volume of the expansion tube 109 has not changed and continues to expand, it means that the gas temperature is too high at this time, and the heat cannot be dissipated by extending the gas flow distance and gas flow time, resulting in a high gas temperature at this time. During the expansion of the expansion tube 109, its surface will apply a thrust to the bottom end of the sliding rod 111, causing the sliding rod 111 to slide toward the top. Because the material of the sliding rod 111 has a heat conductive effect, the heat in the expansion tube 109 will be absorbed during the upward sliding process of the sliding rod 111. When the expansion tube 109 expands and pushes the sliding rod 111 to move upward, the fan 116 is turned on to work and blow on the surfaces of several sliding rods 111. At this time, the airflow blown out by the fan 116 will flow rapidly inside the cooling bin 106, and through the through hole on one side of the cooling bin 106, the heat on the surface of the sliding rod 111 can be quickly blown away, and the external airflow is introduced to complete the air exchange to achieve the effect of lowering the gas temperature in the expansion tube 109.

[0059] It is worth noting that when the gas temperature inside the expansion tube 109 drops to a normal value, the expansion tube 109 will shrink to its initial volume. At this time, several sliding rods 111 inside the cooling chamber 106 will lose their force. Under the action of the second spring 114, the sliding rods 111 can be reset to their initial positions for easy use next time.

[0060] If the pressure sensor detects that the expansion tube 109 continues to expand highly and is in an extremely expanded state, and the value detected by the gas sensor 303 for the gas concentration at this time is within a normal range, it means that the temperature in the detection area is too high. Even if the fan 116 blows air to the sliding rods 111 and exchanges heat with the external air, the gas in the expansion tube 109 cannot be quickly cooled down, resulting in the gas temperature inside the air supply pipe 110 being too high. Since the temperature of the gas flowing through the expansion tube 109 continues to rise, the expansion tube 109 continues to expand. At this time, the surface of the expansion tube 109 pushes the sliding rod 111 to slide upward. Through the continuous expansion state of the expansion tube 109, the top of the sliding rod 111 applies pressure to the bottom end of the driving rod, and the driving rod It slides toward the top in the refrigeration bin 105, and at the same time controls the sealing plug 107 to move toward the top. At the same time, the condensation bin 102 is opened and the refrigerant in the condensation bin 102 is introduced into the refrigeration bin 105 through the delivery pipe 104 and the movement of the self-priming pump. The sealing plug 107 slides upward so that the bottom through hole of the refrigeration bin 105 is no longer blocked by the sealing plug 107 and is connected with one side of the storage bin 113. At this time, the refrigerant in the refrigeration bin 105 will enter the interior of the storage bin 113 through the gap around the driving rod and the refrigeration bin 105, and the refrigerant in the storage bin 113 will flow into the interior of the transmission rod 313 through the through hole on the side of the storage bin 113 close to the sliding rod 111. At this time, the internal gas heat of the expansion tube 109 can be quickly absorbed and the heat exchange is completed, thereby achieving the purpose of quickly reducing the heat in the gas.

[0061] It is worth noting that a through hole is provided at the top of the storage bin 113, and the diameter of the through hole is smaller than the diameter of the bottom end of the driving rod, so that when the transmission rod 313 drives the storage bin 113 to apply pressure to the bottom end of the driving rod, the bottom end of the driving rod will not sink into the storage bin 113, and will be lifted up by the surface of the storage bin 113. The diameter of the through hole in the refrigeration bin 105 for the driving rod to slide is larger than the diameter of the driving rod, so that when the driving rod slides to the specified position, the internal refrigerant will flow into the storage bin 113 along the surrounding gaps where the driving rod contacts the refrigeration bin 105, and enter the interior of the transmission rod 313, so as to achieve the purpose of cooling the gas inside the expansion tube 109.

[0062] If the pressure sensor detects that the expansion tube 109 is still highly expanded and is in an extremely expanded state without any change, and the gas sensing element 303 detects that the gas concentration is high at this time, it means that a fire has occurred in the detection area and the distance between the gas sensor and the fire source is short, which causes the gas temperature in the air supply pipe 110 to continue to be in a high temperature state. Due to the continuous expansion of the expansion tube 109, a high thrust will be applied to the sliding rod 111 at this time. Since the gas inside the expansion tube 109 is still in a high temperature state due to the fire, the internal air pressure of the air supply pipe 110 and the cooling chamber 106 will increase dramatically at high temperature, and then the transmission rod 313 will continue to be pressurized through the expansion tube 109, so that the transmission rod 313 drives the drive rod to continue to push up. When the temperature is still continuously After rising, the transmission rod 313 and the driving rod will penetrate the cooling bin 106. At this time, the cooling bin 106 will rupture and explode, and the cooling bin 106 will spray the internal refrigerant outward to lower the surrounding temperature. The sound produced by the rupture and explosion will be used to alert the staff. Part of the refrigerant in the cooling bin 106 will flow along the air supply pipe 110 to the surface of the gas sensing element 303 and the circuit board 306, protecting the surface of the gas sensing element 303 and the circuit board 306 and absorbing its surface temperature to prevent them from being burned and melted by external fire sources. At this time, the sound caused by the rupture and explosion of the cooling bin 106 will alert the staff to handle the fire, and an alarm will be sounded through the gas sensing element 303, and the circuit on the circuit board 306 will be disconnected. At the same time, the power supply component 3 will be completely disconnected from the external power.

[0063] It is worth noting that the main component of the refrigerant is helium, and helium has a certain insulating property, which can prevent part of the refrigerant from entering the circuit board 306 and the gas sensor element 303 and causing a short circuit. To a certain extent, the circuit board 306 and the gas sensor element 303 can be protected.

[0064] Third embodiment

[0065] This embodiment discloses a method for preparing a multifunctional gas sensor, the method comprising the following steps:

[0066] S1, connect the housing component 1 to the surface of the support plate 202 in the fixing component 2 by screws, and set one side of the circuit board 306 inside the housing component 1;

[0067] S2, welding the gas sensing element 303 and the temperature sensing element 305 to the surface of the circuit board 306, and then electrically connecting the circuit board 306 with the external power supply through the power supply component 3;

[0068] S3. Fix the housing component 1 and the power supply component 3 in the detection area through the fixing component 2.

[0069] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional gas sensor, comprising a housing component (1) and a fixing component (2), wherein the housing component (1) is used to protect an internal circuit structure, and the fixing component (2) is used to install the housing component to an area to be detected, characterized in that: The lower surface of the housing component (1) is fixedly arranged on the upper surface of the fixing component (2), and a power supply component (3) is arranged inside the housing component (1); The shell assembly (1) comprises a first shell (101), one side of the first shell (101) is interconnected with one end of an air supply pipe (110), a cooling bin (106) is fixedly arranged inside the air supply pipe (110), a refrigeration bin (105) is arranged on one side of the inner wall of the cooling bin (106), one side of the refrigeration bin (105) is interconnected with one end of a delivery pipe (104), the other end of the delivery pipe (104) is interconnected with the output end of the condensation bin (102) via a self-priming pump, the surface of the delivery pipe (104) is fixedly arranged on the surface of a support plate (202) via a limiting frame (103), and a pressure sensor is arranged on one side of the inner wall of the cooling bin (106).

2. The multifunctional gas sensor according to claim 1, characterized in that: A filter plate (304) is fixedly connected to one side of the inner wall of the first shell (101), a rotating shaft (307) is slidably arranged inside one side of the filter plate (304), a roller (312) is fixedly connected to the outer surface of the rotating shaft (307), and a return spring (311) is fixedly arranged inside one side of the roller (312); The lower surface of the first shell (101) is fixedly connected to the upper surface of the support plate (202), the upper surface of the support plate (202) is fixedly arranged on the bottom of the circuit board (306), a temperature sensing element (305) is arranged on the surface of the circuit board (306) near the air outlet of the first shell (101), and a fan (116) is arranged on the surface of one end of the air supply pipe (110).

3. The multifunctional gas sensor according to claim 2, characterized in that: The surface of the roller (312) and one side of the sealing plate (310) are intertwined with each other, and the right side of the sealing plate (310) is fixedly connected to one side of the transmission rod (313), the bottom end of the transmission rod (313) is fixedly arranged on the upper surface of the first slider (308), one side of the first slider (308) is movably arranged inside one side of the slide rail (309), and one side of the first slider (308) is fixedly connected to the output end of the electric push rod (314); A plurality of elastic rods are arranged on one side of the transmission rod (313), and the elastic rods are longitudinally equidistantly distributed on the left and right sides of the transmission rod (313), and the diameter of the elastic rods is consistent with the diameter of the filter holes on one side of the filter plate (304).

4. The multifunctional gas sensor according to claim 1, characterized in that: The fixing assembly (2) comprises a support rod (201) and a support plate (202); the surface of the support rod (201) is fixedly arranged inside the support plate (202); the bottom end of the support rod (201) is fixedly connected with a suction cup; a threaded hole is arranged on one side of the support rod (201); the number of the support rod (201) and the suction cup are both four, and each of the support rod (201) and the suction cup are symmetrically distributed on one side of the support plate (202).

5. The multifunctional gas sensor according to claim 1, characterized in that: A driving rod is slidably connected inside one side of the refrigeration bin (105), the top end of the driving rod is fixedly connected to one side of the sealing plug (107), a first spring (112) is fixedly provided on one side of the sealing plug (107), and the bottom end of the first spring (112) is fixedly connected to the bottom surface of the inner wall of the refrigeration bin (105).

6. The multifunctional gas sensor according to claim 2, characterized in that: The upper surface of the circuit board (306) is respectively fixedly welded with a gas sensing element (303) and a socket (302), the inside of one side of the socket (302) and the right end of the power cord (301), and the left end of the power cord (301) is movably arranged inside a slot on one side of the first housing (101).

7. The multifunctional gas sensor according to claim 2, characterized in that: One side surface of the filter plate (304) is provided with filter holes, and one side surface of the filter plate (304) is provided with an anti-slip film, and the anti-slip film is provided on both left and right sides of the filter plate (304).

8. The multifunctional gas sensor according to claim 3, characterized in that: The lower surface of the slide rail (309) is fixedly arranged on the upper surface of the circuit board (306) close to the filter plate (304), and the front and rear side surfaces of the inner wall of the slide rail (309) are fixedly connected to the left end of the electric push rod (314).

9. The multifunctional gas sensor according to claim 3, characterized in that: The surface of the air supply pipe (110) is fixedly connected to a limiting tube (108), one side of the limiting tube (108) is slidably connected to the surface of one side of the sliding rod (111), the upper end of the sliding rod (111) is fixedly connected to a material storage bin (113), one side of the material storage bin (113) is provided with a through hole, the bottom end of the sliding rod (111) is fixedly connected to a force-bearing plate, the upper surface of the force-bearing plate is fixedly connected to a second spring (114), the top end of the second spring (114) is fixedly connected to the inside of the limiting tube (108), an expansion tube (109) is fixedly provided inside one side of the air supply pipe (110), the left and right ends of the expansion tube (109) are fixedly connected to the surface of the delivery pipe (104) through a limiting ring, a vent is provided inside the expansion tube (109), and the surface of the vent is provided with an elastic wire mesh (115).

10. A method for preparing a multifunctional gas sensor, the method being implemented using the multifunctional gas sensor according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: S1, connecting the housing component (1) to the surface of the support plate (202) in the fixing component (2) by means of screws, and placing one side of the circuit board (306) inside the housing component (1); S2, welding the gas sensing element (303) and the temperature sensing element (305) to the surface of the circuit board (306), and then electrically connecting the circuit board (306) to an external power source through the power supply assembly (3); S3. The housing component (1) and the power component (3) are fixedly installed in the detection area by using the fixing component (2).

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